Dehghanojamahalleh Seyedmohsen, Balasubramanian Vignesh, Kaya Mehmet
Department of Biomedical and Chemical Engineering and SciencesFlorida Institute of TechnologyMelbourneFL32901USA.
IEEE J Transl Eng Health Med. 2020 Apr 2;8:1900308. doi: 10.1109/JTEHM.2020.2983147. eCollection 2020.
Heart rate variability (HRV) measurements are performed using a tilt-table (TT) to diagnose dysfunctionality in the autonomic nervous system (ANS) and the cardiovascular system. To maintain homeostasis, the ANS adapts to body position changes through alterations in sympathetic and parasympathetic responses that can be quantified by extracting time-domain and frequency-domain parameters from the heart rate signal. When body position is changed from supine to erect, a healthy subject's response also shows changes in ANS activity. However, TT can be unsafe or uncomfortable for elderly or overweight subjects. Furthermore, it may induce anxiety which alters the HRV measurements. This study proposes an alternative strategy to replace the TT with a zero-gravity chair (ZGC). The statistical analysis between HRV parameters from the TT and the ZGC shows that ZGC can be a feasible alternative to TT. Therefore, ZGC can be used as a more convenient, secure, stable and safer option to the traditional HRV analysis with TT.
心率变异性（HRV）测量通过倾斜台（TT）进行，以诊断自主神经系统（ANS）和心血管系统的功能障碍。为维持体内平衡，ANS通过交感神经和副交感神经反应的改变来适应身体位置的变化，这些变化可通过从心率信号中提取时域和频域参数来量化。当身体位置从仰卧变为直立时，健康受试者的反应也会显示出ANS活动的变化。然而，倾斜台对于老年人或超重受试者可能不安全或不舒服。此外，它可能会引起焦虑，从而改变HRV测量结果。本研究提出了一种替代策略，用零重力椅（ZGC）取代倾斜台。对倾斜台和零重力椅的HRV参数进行的统计分析表明，零重力椅可以作为倾斜台的可行替代方案。因此，与传统的使用倾斜台进行HRV分析相比，零重力椅可以作为一种更方便、安全、稳定且更安全的选择。
